13-letter words
There are 7,827 thirteen-letter words in our dictionary. The most common are INEFFABLENESS, INEFFICACIOUS, INEGALITARIAN, INEXACTITUDES and INEXACTNESSES.
Long words like these rarely fit in one go, but they are the answers to many jumbles, spelling challenges and word-ladder puzzles. Most are built from a shorter root plus a common prefix or suffix.
13-letter words
- ineffableness21
- inefficacious23
- inegalitarian14
- inexactitudes23
- inexactnesses22
- inexhaustibly28
- inexorability25
- inexpediences25
- inexpediently26
- inexperiences24
- inexplainable24
- inexpressibly27
- infantilities16
- infantilizing26
- infeasibility21
- infectivities21
- inferentially19
- inferiorities16
- infertilities16
- infibulations18
- inflationisms18
- inflationists16
- influenceable20
- influentially19
- informalities18
- informatively24
- informatorily21
- infotainments18
- infraspecific25
- infrequencies27
- infusibleness18
- ingeniousness14
- ingenuousness14
- ingratiations14
- ingrownnesses17
- ingurgitating16
- ingurgitation15
- inhabitancies20
- inhabitations18
- inheritresses16
- inhospitality21
- inhumannesses18
- initialnesses13
- injudiciously26
- injuriousness20
- innocuousness15
- inobservances20
- inoffensively25
- inoperculates17
- inopportunely20
- inorganically19
- inosculations15
- inquisitional22
- insalubrities15
- insanitations13
- insatiability18
- insatiateness13
- inscriptional17
- inscriptively23
- inseminations15
- insidiousness14
- insincerities15
- insinuatingly17
- insociability20
- insolubilized25
- insolubilizes24
- insolubleness15
- inspectorates17
- inspectorship22
- inspiritingly19
- inspissations15
- instantaneity16
- instantnesses13
- instaurations13
- instillations13
- instructively21
- instrumenting16
- insufflations19
- insupportably22
- insusceptible19
- insusceptibly22
- integralities14
- intellections15
- intemperances19
- intemperately20
- intenerations13
- intensenesses13
- intensionally16
- intensiveness16
- interbehavior21
- interboroughs19
- intercalating16
- interchaining19
- interchangers19
- intercompared20
- intercompares19
- interconverts18
- intercortical17
- intercropping20
- intercrossing16
- intercultures15
- interdentally17
- interdepended18
- interdictions16
- interdiffused21
- interdiffuses20
- interdigitate15
- interdistrict16
- interdominion16
- interelectron15
- interepidemic20
- interfamilial18
- interferogram19
- interglacials16
- intergrafting18
- intergranular14
- interindustry17
- interinvolved20
- interinvolves19
- interiorising14
- interiorities13
- interiorizing23
- interknitting18
- interlacement17
- interlayering17
- interlinearly16
- intermarginal16
- intermeddlers17
- intermeddling18
- intermediated17
- intermembrane19
- intermittence17
- intermixtures22
- internalising14
- internalities13
- interneuronal13
- interobserver18
- interoceptive20
- interoceptors17
- interpandemic20
- interparticle17
- interpellated16
- interpellates15
- interpellator15
- interpermeate17
- interplanting16
- interpleaders16
- interpleading17
- interpolative18
- interpolators15
- interproximal24
- interracially18
- interrelating14
- interrogatees14
- interruptible17
- intersegments16
- intersessions13
- intersexually23
- intersocietal15
- interspersion15
- interstadials14
- interstimulus15
- interstratify19
- interterminal15
- intertillages14
- intertwisting17
- interworkings21
- intimidations16
- intoxicatedly26
- intoxications22
- intradermally19
- intragalactic18
- intransigeant14
- intransigents14
- intraocularly18
- intrapreneurs15
- intrathecally21
- intrathoracic20
- intravenouses16
- intrepidities16
- intricateness15
- introgressant14
- introgressive17
- introjections22
- intromissions15
- introspecting18
- introversions16
- intuitionisms15
- intuitionists13
- intuitiveness16
- intumescences19
- intussuscepts17
- invaginations17
- invalidations17
- invariability21
- invectiveness21
- inveiglements19
- inventorially19
- inviabilities18
- invidiousness17
- invigilations17
- invigorations17
- inviolateness16
- invisibleness18
- iontophoreses18
- iontophoresis18
- iontophoretic20
- ipsilaterally18
- irascibleness17
- irksomenesses19
- ironmongeries16
- irrationalism15
- irrationalist13
- irreclaimable19
- irreclaimably22
- irrecoverably23
- irrelevancies18
- irreligionist14
- irreligiously17
- irreplaceably22
- irresolutions13
- irritableness15
- isoagglutinin15
- isoalloxazine29
- isoantibodies16
- isocarboxazid34
- isochromosome22
- isochronously21
- isoelectronic17
- isolationisms15
- isometrically20
- isoprenalines15
- isoproterenol15
- isosmotically20
- isostatically18
- isotonicities15
- italicization24
- jabberwockies33
- jackhammering34
- japonaiseries22
- jealousnesses20
- jitterbugging25
- jitterinesses20
- joblessnesses22
- jointednesses21
- jollification25
- joylessnesses23
- judgmatically29
- judiciousness23
- jurisconsults22
- jurisprudents23
- justificative28
- justificatory28
- juvenescences27
- kaffeeklatsch32
- kaleidoscopes22
- katzenjammers37
- kindheartedly25
- kinematically24
- kinesiologies18
- kinnikinnicks27
- kittenishness20
- kleptomaniacs23
- knowingnesses21
- knuckleballer25
- knuckleheaded28
- labanotations15
- labialization24
- laboriousness15
- lactoglobulin18
- laggardnesses16
- lamellibranch22
- languidnesses15
- languishingly21
- languishments19
- laparoscopies19
- laparoscopist19
- laryngectomee21
- laryngologies18
- laryngoscopes21
- lastingnesses14
- laterizations22
- latinizations22
- latitudinally17
- laughableness19
- laureateships18
- lawlessnesses16
- learnednesses14
- leatherleaves19
- lecherousness18
- legalizations23
- legislatorial14
- legitimations16
- legitimatized26
- legitimatizes25
- leishmaniases18
- leisureliness13
- lengthinesses17
- lepidopterans18
- lepidopterist18
Other word lengths
13-letter words starting with
13-letter words ending in
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